Yahweh says that they will bury people in Topheth until there is no more room there. Then Jerusalem would be like Topheth, mentioned in chapter 7 and earlier in this chapter, a place in Jerusalem where the ancient Canaanites had worshipped and sacrificed children in the valley of Hinnom. Thus this Topheth would not exist any longer, because it would become known just for dead bodies. Now both the house of Judah and Jerusalem would be defiled like Topheth, because there would be so many unclean dead people all around. Further, those places that had roof top offerings and libations to the various heavenly bodies or gods would also be defiled like Topheth.